炭素鋼へのクロム基合金のレーザ肉盛り特性 Laser Beam Cladding Characteristics of Chromium-Based Alloy on Carbon Steel

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  CO<sub>2</sub> laser beam was applied to the cladding of chromium alloy using a beam scanner. The hardness and microstructure of the clad layer were investigated by changing the laser power, number of clad layers and overlapped width of the laser beam. The average hardness of the clad layer obtained was 550∼600 HV 0.1, when the conditions were; laser power of 2500 W to 2900 W, clad number of one layer to two layers (thickness of clad layer ; 0.85∼1.90 mm), overlapped width of 0.5 mm, cladding speed of 400 mm/min, defocusing distance of 30 mm, oscillated width of 7 mm and argon as the shielding gas. The microstructure of clad layer was completely transformed into a fine dendritic structure (secondary dendrite arm spacing ; 3∼5 μm) and eutectic structure by the rapid solidification conditions. A heat affected zone was produced on the surface of the carbon steel (base metal) and a martensitic structure could be observed. The heat affected zone was then heat treated also with CO<sub>2</sub> laser beam. The martensitic structure (700 HV 0.1) of the heat affected zone transformed into troostite. EPMA line analysis indicated that an alloyed layer (thickness ; 20∼30 μm) exists between the clad layer and base metal. These results show that CO<sub>2</sub> laser beam cladding of chromium-based alloy serves as a new surface treatment process for carbon steel.

収録刊行物

  • 鋳造工学 = Journal of Japan Foundry Engineering Society  

    鋳造工学 = Journal of Japan Foundry Engineering Society 71(3), 159-164, 1999-03 

    Japan Foundry Engineering Society

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各種コード

  • NII論文ID(NAID)
    10002554881
  • NII書誌ID(NCID)
    AN10514770
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13420429
  • NDL 記事登録ID
    4683494
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-277
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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